A fresh-water European fish of the Carp family (Leuciscus erythrophthalmus). It is about the size and shape of the roach, but it has the dorsal fin farther back, a stouter body, and red irises. Called also redeye, roud, finscale, and shallow. A blue variety is called azurine, or blue roach.

European freshwater fish resembling the roach

In the World of Greyhawk campaign setting for the Dungeons & Dragons role-playing game, Rudd is the Oeridian goddess of Chance, Good Luck, and Skill. She is on good terms with her mentor, Olidammara, and Norebo, but opposes Iuz, Zagyg, Ralishaz.